<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card>
    <!-- 提示区域 -->
      <el-alert
        title="添加商品信息"
        type="info"
        center
        show-icon
        :closable="false"
      ></el-alert>
      <!-- 步骤条 activeIndex - 0 是把字符串转成数字-->
      <el-steps
        :space="200"
        :active="activeIndex - 0"
        finish-status="success"
        align-center=""
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
    <el-form :model="addForm" :rules="addFormRules" ref="addFormRef"
      label-width="100px" label-position="top">
      <el-tabs :tab-position="'left'" v-model="activeIndex"
          :before-leave="beforeTabsLeave" @tab-click="tabClicked()">
        <el-tab-pane label="基本信息" name="0">
          <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类(只支持三级分类)" prop="goods_cat">
              <el-cascader
                expandTrigger="hover"
                v-model="addForm.goods_cat"
                :options="catelist"
                :props="cateProps"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
        </el-tab-pane>
        <el-tab-pane label="商品参数" name="1">
          <!-- 渲染表单item项 -->
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTableData"
              :key="item.attr_id"
            >
            <!-- 复选框组 -->
            <el-checkbox-group v-model="item.attr_vals">
              <el-checkbox
                :label="cb"
                v-for="(cb, i) in item.attr_vals"
                :key="i"
                border
              ></el-checkbox>
            </el-checkbox-group>
          </el-form-item>
        </el-tab-pane>
        <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTableData"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
        <el-tab-pane label="商品图片" name="3">
            <el-upload
              :action="uploadURL"
              list-type="picture"
              :on-preview="handlePictureCardPreview"
              :on-remove="handleRemove"
              :headers="headersObj"
              :on-success="handleSuccess"
              class="el_upload"
            >
              <el-button type="primary" size="small">点击上传</el-button>
            </el-upload>
        </el-tab-pane>
        <el-tab-pane label="商品内容" name="4">
          <quill-editor v-model="addForm.goods_introduce"
          />
          <el-button type="primary" size="small" class="btnAdd" @click="add">提交</el-button>
        </el-tab-pane>
      </el-tabs>
    </el-form>
    </el-card>

    <el-dialog title="图片预览" :visible.sync="priviewVisible" width="50%">
      <img :src="previewPath" alt="" class="previewImg">
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
    data() {
        return {
            activeIndex: '0',
            addForm: {
              goods_name: '',
              goods_price: 0,
              goods_weight: 0,
              goods_number: 0,
              // 商品所属的分类数组
              goods_cat: [],
              attrs: [],
              pics: [],
              goods_introduce: ''
            },
            addFormRules: {
              goods_name: [
                {required: true, message: '请输入商品名称', trigger: 'blur'}
              ],
              goods_price: [
                { required: true, message: '请输入商品价格', trigger: 'blur' }
              ],
              goods_weight: [
                { required: true, message: '请输入商品重量', trigger: 'blur' }
              ],
              goods_number: [
                { required: true, message: '请输入商品数量', trigger: 'blur' }
              ],
              goods_cat: [
                { required: true, message: '请选择商品分类', trigger: 'blur' }
              ]
            },
            catelist: [],
            cateProps: {
              label: 'cat_name', // 显示的值
              value: 'cat_id', // 选中的值
              children: 'children' // 指定属性的父子嵌套关系
            },
            manyTableData: [],
            onlyTableData: [],
            uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
            // 图片上传组件的headers请求头
            headersObj: {
              Authorization: window.sessionStorage.getItem('token')
            },
            // Upload图片预览路径
            previewPath: '',
            priviewVisible: false,
            // 商品内容
            goods_introduce: ''
        }
    },
    created() {
      this.getCateList()
    },
    methods: {
      // 获取所有商品分类数据
      async getCateList() {
        const { data: res } = await this.$http.get('categories')
        if (res.meta.status !== 200) {
          return this.$message.error('获取商品分类数据失败')
        }
        this.catelist = res.data
        console.log(this.catelist)
      },
      // 级联选择器选中回调
      handleChange() {
        // 判断goods_cat的长度是否为3
        if (this.addForm.goods_cat.length !== 3) {
          this.addForm.goods_cat = []
        }
      },
      // Tabs切换回调
      beforeTabsLeave(activeName, oldActiveName) {
        if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
          this.$message.error('请先选择商品分类')
          return false
        }
      },
      async tabClicked() {
        // 动态参数面板
        if (this.activeIndex === '1') {
          const { data: res } = await this.$http.get(
            `categories/${this.cateId}/attributes`,
            {
              params: { sel: 'many' }
            }
          )
          if (res.meta.status !== 200) {
            return this.$message.error('获取动态参数列表失败')
          }
          console.log(res.data)
          res.data.forEach(item => {
            item.attr_vals =
              item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
          })
          this.manyTableData = res.data
        } else if (this.activeIndex === '2') {
          const { data: res } = await this.$http.get(
            `categories/${this.cateId}/attributes`,
            {
              params: { sel: 'only' }
            }
          )
          if (res.meta.status !== 200) {
            return this.$message.error('获取静态属性失败！')
          }
          console.log(res.data)
          this.onlyTableData = res.data
        }
      },
      // upload图片预览回调
      handlePictureCardPreview(file) {
        this.previewPath = file.response.data.url
        this.priviewVisible = true
      },
      // upload图片删除回调
      handleRemove(file) {
        console.log(file)
        // 1.获取将要删除的图片临时路经
        const filePath = file.response.data.tmp_path
        // 2.从pic数组中找到对应图片的索引值
        const i = this.addForm.pics.findIndex(x => x.pic === filePath)
        // 3.调用数组的splice方法，把图片信息对象从pic数组中删除
        this.addForm.pics.splice(i, 1)
        console.log(this.addForm)
      },
      // 监听文件上传成功时的回调
      handleSuccess(response) {
        console.log(response)
        // 拼接得到图片信息对象
        const picsInfo = { pic: response.data.tmp_path }
        // 将图片信息对象push到pics数组中
        this.addForm.pics.push(picsInfo)
        console.log(this.addForm)
      },
      add() {
        console.log(this.addForm)
        this.$refs.addFormRef.validate
        (async valid =>{
          if(!valid){
            return this.$message.error('请填写必填的表单项')
          }
          const form = _.cloneDeep(this.addForm)
          form.goods_cat = form.goods_cat.join(',')
          this.manyTableData.forEach(item => {
            const newInfo = {
              attr_id: item.attr_id,
              attr_value: item.attr_vals.join(',')
            };
            this.addForm.attrs.push(newInfo);
          });
          this.onlyTableData.forEach(item => {
            const newInfo = {
              attr_id: item.attr_id,
              attr_value: item.attr_vals.join(',')
            };
            this.addForm.attrs.push(newInfo);
          });
          form.attrs = this.addForm.attrs
          console.log(form)
          const {data:res} = await this.$http.post('goods', form)
          console.log(res)
          if (res.meta.status !== 201) {
            return this.$message.error('添加商品失败！')
          }
          this.$message.success('添加商品成功！')
          this.$router.push('/goods')
        })
      }
    },
    computed: {
      cateId() {
        if (this.addForm.goods_cat.length === 3) {
          return this.addForm.goods_cat[2]
        }
        return null
      }
    }
}
</script>

<style lang="less" scoped>
.el-checkbox {
  margin: 0 10px 0 0 !important;
}
.previewImg {
  width: 100%;
}
.el_upload {
  margin: 20px 0 0 10px;
}
.btnAdd {
  margin-top: 15px;
}
</style>